The primitive data types only allow a(n) __________ to hold a single value.

________ are stored in the database and used to display values that meet criteria

Fill in the blank(s) with correct word

The ____________________ connection is the only direct connection between sender and receiver and is at the physical layer, where actual 1s and 0s are transmitted over wires or airwaves.?

Fill in the blank(s) with the appropriate word(s).